diff --git a/defaults/main.yml b/defaults/main.yml
index b46790a3..1287b535 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -106,6 +106,7 @@ ceilometer_pip_packages:
   - pycrypto
   - warlock
   - pymongo
+  - tooz
 
 ## Service Names
 ceilometer_service_names: